Matthew 24:50 ἥξει ὁ κύριος τοῦ δούλου ἐκείνου ἐν ἡμέρᾳ ᾗ οὐ προσδοκᾷ καὶ ἐν ὥρᾳ ᾗ οὐ γινώσκει,
the lord of that servant will come in a day when he doesn't expect it, and in an hour when he doesn't know it,
Noun: Genitive Singular Masculine

Luke 12:46 ἥξει ὁ κύριος τοῦ δούλου ἐκείνου ἐν ἡμέρᾳ ᾗ οὐ προσδοκᾷ καὶ ἐν ὥρᾳ ᾗ οὐ γινώσκει, καὶ διχοτομήσει αὐτὸν καὶ τὸ μέρος αὐτοῦ μετὰ τῶν ἀπίστων θήσει.
then the lord of that servant will come in a day when he isn't expecting him, and in an hour that he doesn't know, and will cut him in two, and place his portion with the unfaithful.
Noun: Genitive Singular Masculine

Galatians 4:1 Λέγω δέ ἐφ' ὅσον χρόνον ὁ κληρονόμος νήπιός ἐστιν, οὐδὲν διαφέρει δούλου κύριος πάντων ὤν,
But I say that so long as the heir is a child, he is no different from a bondservant, though he is lord of all;
Noun: Genitive Singular Masculine

Philippians 2:7 ἀλλὰ ἑαυτὸν ἐκένωσεν μορφὴν δούλου λαβών, ἐν ὁμοιώματι ἀνθρώπων γενόμενος· καὶ σχήματι εὑρεθεὶς ὡς ἄνθρωπος
but emptied himself, taking the form of a servant, being made in the likeness of men.
Noun: Genitive Singular Masculine

Revelation 15:3 καὶ ᾄδουσιν τὴν ᾠδὴν Μωϋσέως τοῦ δούλου τοῦ θεοῦ καὶ τὴν ᾠδὴν τοῦ ἀρνίου λέγοντες, μεγάλα καὶ θαυμαστὰ τὰ ἔργα σου, κύριε ὁ θεὸς ὁ παντοκράτωρ· δίκαιαι καὶ ἀληθιναὶ αἱ ὁδοί σου, ὁ βασιλεὺς τῶν αἰώνων· / ἐθνῶν·
They sang the song of Moses, the servant of God, and the song of the Lamb, saying, "Great and marvelous are your works, Lord God, the Almighty! Righteous and true are your ways, you King of the nations.
Noun: Genitive Singular Masculine